My book, English for Research Papers: A Handbook for Brazilian Authors, is now available at Amazon, and I just wanted to invite you to review it there. Here is a link to the book:  

http://www.amazon.com/English-Research-Papers-Handbook-Brazilian-ebook/dp/B00GPT0FXW/ref=sr_1_1?ie=UTF8&qid=1384714433&sr=8-1&keywords=english+for+research+papers+a+handbook+for+brazilian+authors